cache

type Cache struct {
	Stager               Stager
	Command              Command
	Log                  *libbuildpack.Logger
	NodeVersion          string
	NPMVersion           string
	YarnVersion          string
	PackageJSONCacheDirs []string
}

type Command interface {
	Execute(string, io.Writer, io.Writer, string, ...string) error
}

type Stager interface {
	BuildDir() string
	CacheDir() string
	ClearCache() error
}